Hello, I got a Nvidia 1070, Ryzen 5 2600, 8GB Ram 2666mhz, 550W Psu gold certified, And I'm playing fortnite at default resolution 1920x1080 at lowest settings. Always when I make it till endgames I get fps drops and lag really hard. I dont know what the possible bottleneck is. My memory is like always at 70-80 percent and my gpu runs at 60 percent while I'm playing. Need 16 GB Ram?